WASHINGTON (CNN) -- Homeland Security Secretary Tom Ridge plans to leave his post, according to senior administration sources, although no one will officially confirm his intention to depart.

Department of Homeland Security spokesman Brian Roehrkasse said Tuesday morning that reports of Ridge's departure were "news to him." He added that Ridge had not made any decisions about his future and that there have been no discussions with the White House.

Ridge, in the past, has declined to be specific when answering questions regarding his future as head of the department. In July there were reports Ridge told colleagues he was considering stepping down after the November election because of job stresses and the need to earn money in the private sector to pay his children's college costs.

"After President Bush is re-elected, we'll have to have that conversation," he said at the time.

Ridge was in Hawaii Tuesday at an event to highlight the US-VISIT border-security program.

The reshuffling of Bush's Cabinet for his second term continued this week with four resignations. On Tuesday, Bush nominated national security adviser Condoleezza Rice to succeed Colin Powell as secretary of state. (Full story)